Khan Academy on a Stick
Inclined Plane Force Components
Figuring out the components of the force due to gravity that are parallel and perpendicular to the surface of an inclined plane
If the above player doesn't work, you can try this direct link.
Figuring out the components of the force due to gravity that are parallel and perpendicular to the surface of an inclined plane
If the above player doesn't work, you can try this direct link.